Home » BTS Publications » Commodity Flow Survey » 2002 » Metropolitan Areas

Table B-6. Estimated Measures of Reliability for Shipment Characteristics by Commodity Group and Mode of Transportation for CBSA of Origin: 2002

Table B-6. Estimated Measures of Reliability for Shipment Characteristics by Commodity Group and Mode of Transportation for CBSA of Origin: 2002

[Estimates are based on data from the Commodity Flow Survey. Because of rounding, estimates may not be additive]

Excel | CSV

All Commodities

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 10.4 – 21.7 – 33.5 – 25.9
Single modes 11.1 2.3 21.8 0.4 33.9 1.1 20.4
Truck 11.8 3.0 21.7 3.1 25.8 7.2 23.7
Rail S S S S S S 25.6
All other Single modes 39.1 0.4 41.9 – 48.7 – 17.7
Multiple modes 36.1 2.3 44.6 0.2 41.5 1.1 11.8
Parcel, USPS or courier 36.2 2.3 46.1 0.1 49.0 1.1 12.3
All other multiple modes S S S S S S 30.1
Other and unknown modes 23.0 0.5 S S 45.0 0.3 S

SCTG 01-05, Agriculture products and fish

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 34.4 – 42.3 – S S S
Single modes 34.5 0.4 42.4 0.2 S S S
Truck 34.5 0.4 42.4 0.2 S S S
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes S S S S S S 31.6
Parcel, USPS or courier – – – – – – –
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S 31.0

SCTG 06-09, Grains, alcohol, and tobacco products

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 14.6 – 12.9 – 26.0 – 44.8
Single modes 14.8 0.9 12.6 0.7 26.0 – 41.9
Truck 14.7 0.9 12.6 0.7 25.8 0.2 41.5
Rail S S S S S S 31.6
All other Single modes S S S S S S 31.6
Multiple modes S S S S S S 44.9
Parcel, USPS or courier S S S S S S 44.9
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 30.9

SCTG 10-14, Stones, non-metallic minerals, and metallic ores

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 32.2 – 42.7 – 33.7 – S
Single modes 36.7 8.1 42.9 0.8 33.7 0.2 S
Truck 39.2 8.3 43.5 4.4 45.3 9.7 S
Rail 40.9 4.3 40.8 4.4 42.2 9.6 26.1
All other Single modes – – – – – – –
Multiple modes S S S S S S 31.6
Parcel, USPS or courier – – – – – – –
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S 31.8

SCTG 15-19, Coal and petroleum products

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes S S S S S S 32.3
Single modes S S S S S S 32.1
Truck S S S S S S 32.1
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes – – – – – – –
Parcel, USPS or courier – – – – – – –
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 30.3

SCTG 20-24, Pharmaceutical and chemical products

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 21.4 – 29.7 – 39.0 – S
Single modes 25.2 12.2 29.8 11.0 39.1 12.1 S
Truck 25.3 11.8 30.9 10.9 42.1 13.1 S
Rail S S S S S S 27.9
All other Single modes S S S S S S 31.6
Multiple modes S S 44.4 10.5 46.8 12.0 S
Parcel, USPS or courier S S 44.4 10.5 46.8 12.0 S
All other multiple modes S S S S S S 31.6
Other and unknown modes 46.7 1.8 48.7 2.5 49.9 0.3 S

SCTG 25-30, Logs, wood products, and textile and leather

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 30.4 – 15.9 – 29.7 – 23.3
Single modes 36.4 8.1 17.4 3.8 33.8 7.3 S
Truck 36.4 8.1 17.4 3.7 33.3 6.8 S
Rail S S S S S S 31.6
All other Single modes S S S S S S 28.6
Multiple modes 47.5 7.6 47.9 3.7 S S 14.2
Parcel, USPS or courier 47.5 7.6 48.0 3.7 S S 13.9
All other multiple modes S S S S S S 31.6
Other and unknown modes 35.5 1.8 S S S S S

SCTG 31-34, Base metal and machinery

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 20.9 – 29.0 – S S 30.1
Single modes 20.4 5.7 29.2 1.1 S S 49.2
Truck 20.9 5.5 26.2 4.7 46.4 11.5 S
Rail S S S S S S 31.6
All other Single modes S S S S S S 28.7
Multiple modes S S S S S S 20.3
Parcel, USPS or courier S S S S S S 20.2
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S 46.1 0.2 S

SCTG 35-38, Electronic, motorized vehicles, and precision instruments

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 19.8 – 29.6 – 38.7 – S
Single modes 23.7 5.1 29.8 2.7 41.5 4.9 S
Truck 27.2 8.5 30.9 4.6 44.9 6.7 S
Rail S S S S S S 31.6
All other Single modes S S S S S S 26.4
Multiple modes 35.6 5.1 39.1 2.5 28.4 4.9 20.4
Parcel, USPS or courier 35.6 5.1 39.1 2.5 28.5 4.9 20.4
All other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S S

SCTG 39-43, Furniture, mixed freight and misc manufactured products

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 24.6 – 38.9 – 28.4 – S
Single modes 27.9 5.1 40.2 5.9 30.0 10.5 S
Truck 27.9 5.2 40.2 5.9 30.2 10.3 S
Rail – – – – – – –
All other Single modes S S 42.9 0.5 45.0 1.3 25.6
Multiple modes 49.5 5.1 S S S S 22.5
Parcel, USPS or courier 49.5 5.1 S S S S 22.5
All other multiple modes – – – – – – –
Other and unknown modes 45.9 1.4 S S S S 49.0

Commodity Unknown

Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 36.5 – S S S S S
Single modes 32.9 10.2 S S S S S
Truck 32.9 10.2 S S S S S
Rail – – – – – – –
All other Single modes – – – – – – –
Multiple modes S S S S S S 31.6
Parcel, USPS or courier S S S S S S 31.6
All other multiple modes – – – – – – –
Other and unknown modes S S S S S S 28.6

KEY:
– Represents data cell equal to zero or less than 1 unit of measure.
S Estimate does not meet publication standards because of high sampling variability or poor response quality.
CV Coefficient of variation of number

NOTE: The Introduction and appendixes give information onf confidentiality protection, sampling error, nonsampling error, sample design, and definitions. Links to this information on the Internet may be found at www.census.gov/cfs.

SOURCE: Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Metropolitan Data, December 2004.